Motor-belt



R. D. EDWARDS.

MOTOR BUT.

APPLICATION-FILED MAR. 24, 1919.

1,335.281). Patented Mar. 30- 1920.

fioberf 17. fdiramls UNITED STATES PATENT oEEIcE.

7 ROBERT D. EDWARDS, OF KANSAS CITY, MISSOURI.

MOTOR-BELT.

Application filed March 24, 1919.

To all whom it may concern Be it known that I, ROBERT D. EDWARDS, acitizen of the United States, residing at Kansas City, in the county ofJackson and State of Missouri, have invented certain new and usefulImprovements in Motor-Belts; and I do declare the following to be afull, clear, and exact description of the invention, such as willenableothers skilled in the art to which it appertains to make and usethe same, reference being had to the accompanying drawings, and to theletters and figures of reference marked thereon, which form a part ofthis specification.

This invention relates to machine driven belts and one of the objects ofthe invention is to construct a motor belt of fabric, the belt beingsubstantially V-shaped in cross section and built up of a plurality offolded sections stitched together in such a manner that the pulleyvcontacting surface willbe substantially free of bumps or inequalities.

The invention especially contemplates the provision of means forconstructing a motor driven fan belt having the advantages of thoseusually employed for driving a cool ing fan on the end of a motorvehicle engine. Ordinarily leather belts are employed for drivingcooling fans for motor vehicles but these are objectionable becausewater causes them to contract and rot and mineral oils not only rot-thembut cause them to stretch; therefore, it is difficult to maintain a beltat. the proper tension and besides, the life of a leather belt is liableto be relatively shorton account of the difiiculties just enumcrated.

In actual practice, fabric belts have been found to possess markedadvantages over leather belts but heretofore, these have generally beenflat and as a result, some of the advantages gained by the fabric overleather have in a measure, been nullified by the fact that leather beltscan be constructed to fit V-grooved pulleys and thereby provide reaterfrictional surface and reduce the liability of slipping.

According to my invention, not only is the advantage of the use offabric retained but the added advantage of constructing a V-shaped beltis also present so that I combine the inherent advantages of a leatherbelt with those of a belt made of fabric.

Specification of Letters Patent.

Patented Mar. 30, 1920.

Serial No. 284,772.

In the drawings,

Figure I is a fragmentary perspective view of a belt constructed inaccordance with my invention.

Fig. II is a fragmentary perspective view of the meeting edges of astrip showing a bias seam.

Figl' III is a similar view showing the seam ed es pressed back upon thefabric.

Fig. I is a detail perspective view showing the edges of the stripfolded 'back upon itself and indicating the staggered position of theseam.

Fig. is a fragmentary perspective view of one of the strips in itscompleted position preiparator'y to being sewed to another strip, an

Fig. V1 is a cross sectional view through the finished belt. I I

In constructing the belt I prefer to provide a plurality of strips offabric as, for example, sea island cotton tire fabric or heavy canvas,the width of the strips'varying according to the position they are tooccupy in the completed belt. The strips are cut in appropriate lengthswith inclined or biased ends and these edges are then sewedtogetherpreferably by a single line of stitching,

In Fig. II I have shown the meeting edges of such a strip 1, the line ofstitching being shown at 2 and the seam edges 3 and 4.- projectingoutwardly preparatory to being folded down, as shown in Fig. III. Thelongitudinal edges of the strips are then folded over upon the bodyportion thereof to provide folds 5 and 6 and secured thereto by lines ofstitching 7 and 8, as seen in Fig.

IV, the longitudinal edges of the strip being slightly spaced apart sothat the strip may be folded again along its longitudinal center in theform shown in Fig. V and again stitched by lines of stitching 9 and 10to provide one 4-ply unit of the belt.

In the present instance, Ihave shown the belt as constructed of threeunits of progressively decreasing widths from the perimeter to the innerunit so that the edges of the belt converge to form what is knowncommercially as a V-shaped belt, the several units or sections beingheld together by suitable lines of stitching. Such abelt possesses allof the inherent advantages of a types of belts usec for the purposespecified. By joining the meeting edges of the strips to form an initialband with a bias seam, the finished unit will have the seam staggered sothat the point of connection in the finished belt will not beperceptible and will be devoid of bumps or inequalities which might beoccasioned if a seam was made at right angles to the longitudinal edgesof the strip. This will be apparent by reference to Figs. IV and V.

Having thus described my invention,

what I claim as new therein, and desire to secure by Letters-Patent is:p

A motor belt consisting of a plurality of independently formed fabricsections of progressively decreasing widths, each section consisting ofa strip having its edges folded back upon the main portion of the stripso as to leave a space between the said edges, the folded back portionsbeing stitched to the main portion and then folded over (me upon theother and again stitched along their outer edges and stitching securingthe sections together.

In testimony whereof I aflix my signature.

ROBERT D. EDWARDS.

